diff --git a/vehicle/smart-hello.go b/vehicle/smart-hello.go
index 114dc274b..6f8e9f62e 100644
--- a/vehicle/smart-hello.go
+++ b/vehicle/smart-hello.go
@@ -58,9 +58,7 @@ func NewSmartHelloFromConfig(other map[string]any) (api.Vehicle, error) {
 		return v, err
 	}
 
-	if vehicle.ProprietaryPlatform != 0 {
-		return v, fmt.Errorf("unsupported vehicle platform: %s", vehicle.SeriesCodeVs)
-	}
+	api.SetSeries(vehicle.SeriesCodeVs)
 
 	v.Provider = hello.NewProvider(log, api, vehicle.VIN, cc.Cache)
 
diff --git a/vehicle/smart/hello/api.go b/vehicle/smart/hello/api.go
index 7c6aa6396..ad8dcb122 100644
--- a/vehicle/smart/hello/api.go
+++ b/vehicle/smart/hello/api.go
@@ -18,12 +18,14 @@ import (
 type API struct {
 	*request.Helper
 	identity *Identity
+	baseURI  string
 }
 
 func NewAPI(log *util.Logger, identity *Identity) *API {
 	v := &API{
 		Helper:   request.NewHelper(log),
 		identity: identity,
+		baseURI:  ApiURI,
 	}
 
 	v.Client.Transport = &transport.Decorator{
@@ -54,6 +56,14 @@ func NewAPI(log *util.Logger, identity *Identity) *API {
 	return v
 }
 
+// SetSeries selects the API host for the vehicle's platform.
+// Smart #5 (series HY) is served by the V2 host; #1/#3 (HX/HC) use V1.
+func (v *API) SetSeries(series string) {
+	if strings.HasPrefix(series, "HY") {
+		v.baseURI = ApiURIV2
+	}
+}
+
 func (v *API) request(method, path string, params url.Values, body io.Reader) (*http.Request, error) {
 	if body != nil {
 		b, err := io.ReadAll(body)
@@ -74,7 +84,7 @@ func (v *API) request(method, path string, params url.Values, body io.Reader) (*
 		body.(*bytes.Reader).Seek(0, io.SeekStart)
 	}
 
-	uri := fmt.Sprintf("%s/%s?%s", ApiURI, strings.TrimPrefix(path, "/"), params.Encode())
+	uri := fmt.Sprintf("%s/%s?%s", v.baseURI, strings.TrimPrefix(path, "/"), params.Encode())
 	req, err := request.New(method, uri, body, map[string]string{
 		"x-api-signature-nonce": nonce,
 		"x-signature":           sign,
@@ -104,6 +114,7 @@ func (v *API) Vehicles() ([]Vehicle, error) {
 		"userId":        {userID},
 	}
 
+	// vehicle list is fetched on V1: SetSeries runs only after this call
 	path := "/device-platform/user/vehicle/secure"
 	req, err := v.request(http.MethodGet, path, params, nil)
 	if err != nil {
diff --git a/vehicle/smart/hello/const.go b/vehicle/smart/hello/const.go
index 9ba093543..21acf5cd7 100644
--- a/vehicle/smart/hello/const.go
+++ b/vehicle/smart/hello/const.go
@@ -1,8 +1,9 @@
 package hello
 
 const (
-	ApiURI = "https://api.ecloudeu.com"
-	ApiKey = "3_L94eyQ-wvJhWm7Afp1oBhfTGXZArUfSHHW9p9Pncg513hZELXsxCfMWHrF8f5P5a"
+	ApiURI   = "https://api.ecloudeu.com"   // Smart #1/#3 (series HX/HC)
+	ApiURIV2 = "https://apiv2.ecloudeu.com" // Smart #5 (series HY)
+	ApiKey   = "3_L94eyQ-wvJhWm7Afp1oBhfTGXZArUfSHHW9p9Pncg513hZELXsxCfMWHrF8f5P5a"
 
 	appID        = "SmartAPPEU"
 	operatorCode = "SMART"